Referenced RMA order not capturing customer PO from order header to order line level

Summary:

When we create a reference RMA and input PO number at the order header level, it doesn’t get passed to the line level. let us know why the PO doesn’t appear at the line level? We need the PO to show up at the line level.

For unreferenced RMA, When we type the PO, it does pass to the line level as expected.

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Version (include the version you are using, if applicable): R13 24B

Code Snippet (add any code snippets that support your topic, if applicable):